Figure 5.

Color-coded schematic map of the motor neuron columns innervating the Fluoro-Gold targeted forelimb muscles. The color schemes remain consistent with that of Figures 1B,C. (A) Rostro-caudal map of the motor neuron columns innervating the targeted forelimb muscles. These columns were obtained by combining plots from Figure 3. The nerve root exit points represent the halfway point between spinal cord segments throughout C2–T1. (B) Dorso-ventral and medio-lateral map of the motor neuron columns innervating the targeted forelimb muscles for spinal cord segments C3, C5, and C7. The gray matter contours were adapted from Watson et al. (2009).